AIBU or is she?

[Joolsy]

My SIL is always making digs at me, albeit only joking, but it does get to me as she seems to do it every time I see her. She seems to think I'm tight, I don't think I am, I can be generous but don't waste money. For instance, at Christmas we get both her boys a small money box with a bit of money in it. She said to me "I'm surprised you didn't try to take the money out". Obv she must have been joking as I wouldn't dream of doing anything like that but all her digs are similar to that. How can I deal with this without coming across as someone lacking a sense of humour? Thanks

Throw a custard pie at her.
Or spray her with an old fashioned soda symphony.
Both would be funny, thus securing your sense of humour status.

Maybe say "isn't that joke getting a bit tired now? Can you try and think of another one"

What a git. Don't worry how you come across, tell her she is being rude!

Maybe respond with, "What a hurtful/unkind/mean/nasty thing to say" every time.

symphony ??
syphon obviously.

YANBU

I'd just laugh and say "you really are obsessed with how I spend my money aren't you?! Why is that? And cock your head to one side

ha ha ha ha Fuck Off ha ha ha

With a very slight undertone of menace and a when only she is looking.

You get them a money box every year?

No not every year, just last Christmas. Should have said "got" not "get".

Say 'Good idea, I'll do that next time'

Just tell her she's rude. I don't see a problem.

I would start mentioning her limited repertoire of 'witty' comments every time she says something so that eventually if she wants to mention your supposed tightfistedness, she will come to expect a comeback from you about being a one trick pony. It might not work, but at least it will make you feel better!

I would of said something along the lines of "Do you want to count it, to make sure it's all there? I know how keen you are to see how much I'm spending haha"

Or alternatively

"You ungrateful bitch, haha"